The ebay rates seem a bit excessive at the moment but that's pretty normal in summer time - I know I bought screen on its own off ebay for £60 a few months back. Might be best to ask for best offer and see what response you get, gives you the option to accept or refuse.
The value and how much people pay are two different things...
I'd say your value is about right, but you can capture a larger market on ebay (so more likely to sell on there). I had a wind deflector on its own up for about £100 on the forum for a few weeks, not much interest. Popped it on ebay and got close to £150... now perhaps that is excessive but it's all about supply and demand... GLWTS